Mortising machine



F. W. MONROE MORTISING MACHINE Filed March 18, 1930 4 Sheets-Sheet Nov.l, 1932.

Nov. l, 1932. I F. w. MoNRoE `1,885,752

' MOBTISING lvrAcH'INEv 4 sheets-sheet 2 Filed March 18, 1930` mN mw WNl nw. um?

F. W. MNROE mi, E, 13.932,

MQRTISING MACHINE 4 Sheets-Sheet 5 Filed March 18, 1930 z3 l W /i Nov.l, 1932. F, w, MONROE ,885,752

MORTISING MACHINE Filed March 18, 1930 4 Sheets-Sheet Al .z el

Patented Nov. 1, 1932 UNIT-ED- SITES- FREDERICK W. MONROE, oEA'rLANTIccITY, iiEWfrEEsEY,-AssIeNoE ro MAcKIN'rosI-i HUTcHINsoN, E PHILADELPHIA,PENNSYLVANIA MoE'rIsINe MACHINE Application led MarchlS, 1930. vSeri-a1No. 436,774-,Y

My invention relates to wood working machines, more particularly tomortising machines, embodying a boring bit and a chisel.

It has among its objects to' simplify andY 55 cheapen the constructionand number of parts without detracting. from efficiency, thus malr-` ingpossible to replace the more expensive machines with the` improvedmachine which will give practically as good if not better re#k sults andat a great-reduction in the cost of construction, due to thel novelfeatures of con-v struction embodied in the new machine. To theaccomplishment of thefforegoing and such other objects as mayhereinafter appearthe invention consists in the. features illustrated inthe selected embodiment of the invention, and sought to be clearlydefined by the appended claims, reference being had to the accompanyingdrawings forming a part hereof and in: which: Y Y v Figure 1 is..a sideelevation, partially in longitudinal section, illustrating one'embodi-vment of the invention;

Figure 2 a plan view ofFigure 1;

Figure 3 a Ycross section through the work-table elements on line 3-3 ofFigure 1; Figure 4 a vertical section through the upper endof themachine standard, showing the sheave for the cable by which longitudinal'ao movement is given to the boring-'bit and chisel; Y Y

Figure 5 a cross section on the line 5-5 of Figure 6 across section online 6 6 of Figure 1 ;l

ing-bit and ,chisel operate in a vertical plane;

Figure 8 a modificatlonshowing lan electric motor instead of aline-shaftdriven pul- 1 gitudinal movement on its Vshaft or spindle..

- .In the drawings, in the form, illustrated in- Figure 1, the numeral-1indicatesrasuit#Y Figure 7, a modification in which the bor-Vyrotatewith the pulley and .be longitudinally able base or standard,which may be `'of hollow or other formation,l and upon the upper end ofwhich rests a platform plate 2, which. may be secured thereto by anydesired num.- ber of bolts 3. The platform or plate 2 sup,- ports .thevfollowing elements when disposed for Ythe-boring-bit and'chisel tooperate in a horizontal plane las illustrated in Figure 1. The numeral4V indicatesf a casting formed with a hollow base 5 and a tubular member6 which serves as a boxing to receive a slidable tubular spindle 7containing at one end a chuck 8 to receiverthevshank ofa tubular ychisel 9, the chuck and chisel being held in place by 4a set screw ,10passing through the end of thel tubular spindle 7 and the chuck, withits ,end bearing against the shank-of the chisel-so that the chuck andchisel will move with the tubular spindle in reciproca-V tion of thespindle. l rllhe exterior of the chisel shank maybe formed with a flangeo'r collar 1.1 to bear against the end of the chuck v and limit theinsertion of the chisel therein, andA the tubular spindle at itsforwardend may be Vformed-with an external shoulder or .7 flange 12which willr contact with the end of the tubular boxing 6 to limit therearward reciprocation of the tubular spindle 7.v The base of thecasting 4 may be made .with a flange 13 through which the bolts 3 -maypass to secure the castingrtothe base plate 2. l/Vithin thetubularspindle 7 is a rotatable spindle orshaft 14 having, together withbushing37 substantially ,the diameter of the' Vinterior of spindle 7andhavingat-its rear g5 a .reduced end 15 constituting an extension ofthe spindle 14, passing through a cap 16,' secured by bolts' 17, orotherwise to the endv of spindle 7, and journalled in aboxing18 andcarrying a driving member which may be a pulley or sheave 19 driven by aline-drive belt 20, splined-to the spindle or shaft extensionl byagroove2l therein and a spline or kcyy22so that the shaft extension mayslidable thereinrlfhe pulley mayhavea .collar 28 attached to one,lface', and provided with anannular flange 24Yadapted to co-operate withthe walls of a recessed member 25 y I formed aspart of ,a bracket27'whiohV sup-v los ports the boxing 18 as illustrated in Figure 1, orwith a flange 26 extending Vup from the base of bracket 27 asillustrated in Figure 10 of the drawings, so that under either Vform thepulley will rotate with the shaft 14 0r its extension 15 and beprevented from moving longitudinally of the shaft'or its extension.Encircling the shaft extension 15, within the tubular spindle 7, betweenthe cap 16 and the shouldered endl of spindle 14`areV held againstrotation, say by keys 38 fitting in receiving recesses orgrooves formedin the interior of boxing 6 and exterior of the tue. bular spindle 7, asclearly indicated inFigs.`

5 and 6 of-the drawings. The tubular spindle 7 and internal spindle 14are moved into engagement with the work that will rest on the work table39, by means of a cable 40 connected at one end to the cap 16 of thetubular spindle 7 and passing through the hollow base of casting 4, andVover a sheave 41 journaled in bearings 42 depending fromV the undersideof the base plate 2 at the upper end of standard 1, and will have itslower end connected to a suitable foot pedal (not shown) lso that ondepressing the pedal the spindle carrying the chisel and thev spindlecarrying the boring-bit will be moved towards the piece of work on thework table. Around the cable 40 is a spiral` compression spring 43attached at one end to the casting 4 and at th'e other'end to thetubular spindle 7, say through its end cap 16. This spring vis placedunder compression in the forward movement of the spindles carrying thechisel and boring bit, and when the cable 40 is released the recoil ofspring 43 retracts the chisel and boring bit to normal position. Acushioning spring 44 is disposed in the path of retraction ofthe chiseland boring bit spindles, say as illustrated in Fig. lof the drawings, soas to cushion the retraction of the parts. 1 i

A work table 39 is disposed in the path of travel ofthe chisel andboring bit to support the piece of work to be operated on'. This tablein the form illustrated in Figure 1, is

provided with adjustable clamps45 and 46 of a suitable type forholdingthe work on the table. The table is screw threaded to theA upperend of a post 47 so as to be rotativelyY adjusted to present the work atthe angle desired tothe? chisel and boring bit, and is,

held to its adjustment by a set screw 48. The post 47 is preferablytubular and is vertically movable in a swinging hanger-sleeve 49suspended from the forward end of the platto thechisel and boring bit'atthe vertical angle desired for Athe plane ofthe bore or cavity to be cutin the work, or in a true horizontal'plane as desired, and when adjustmenthas beenmade to the plane desired,-

the nut on the bolt is tightened and the Lhanger held to its adjustment.The 1 post is slidable within the sleevehanger 49 andtis prevented fromrotating therein by keys 51 fitting in recessesformed in the sleeve 49and post .47 as clearly shown in Fig. 3 of the drawings. The post 47 israised and lowered by a screwk 52 threaded into a cross-bar 53 at thelower end of the post .and provided with a collar 54 secured by a setscrew 55 to the lower vend of the screw, above a removable plate' 56secured by *boltsl 57 to the end of the sleeve hanger as shown in Fig.lof the drawings, and also with a collar 58 secured bya. set screw 59 tothev end Aof screw 52 beneath the plate 56 and havingv a crank handlev60 foroperating the screw, Y

.Figure illustrates a vertical disposition of the parts of the mortiserinstead of a hori- I zontal positionas illustrated in Figure 1.

The several elements constituting the ma-V chine are substantially thesame as corresponding parts shown inFigure 1 Vand ac; cordingly the samereferencev numerals vin Figure 7 areused for corresponding elementsfound'in Figure 1', and as the construction is substantially the .same ashowing of the details of the various elements is unnecessary. In Atheform of Figure v7, the work table designated by the numeral 39aisillustrated as stationary as the chisel and boring `bit are moveddownwardly toward the table .and therefore it is not necessary to havethe table move upwardly towards the chisel and boring bit. Also asillustrated in Figure 7 the base plate 2 may be bolted or otherwiseattached to theface of a suitable upright supportla.

In Figure 8 is yillustrated a disposition of the parts of the machine in'an upright instead of kin a horizontal planeandin which avsuitable formof electric motor 61,`may be used for rotating the spindle 14,15 Vwhichcarriesthe boring bit instead ofV a line shaft driven pulley shownin'Figures 1 and7. vvEither a line shaft drivenfpulley,'or anelectricmotor may beused in anyof the differentvforms il- -lust rated,and hence bothA types of driving means V.for the rotating spindle havebeen shown.' In the form of machineV shownfin Figure 8 the base plate 2isY shown attached by bolts, orotherwise, to an kupright-supe port orstandard la, and a work table 391i is shown as having a post 47?;slidable in `a sleeve 49?) which mayv be attached by a bracket 50?) andbolt 5l?) to the standard la. The postb may be raised and lowered by ascrew lifting means like that illustrated for the form `shown in Figure1 of the drawmgs and therefore not needing a detailed illustration anddescription. The parts in Figure 8 corresponding to like parts in Figure1 bear correspondingV identifying numerals and in view of the previousdescription need no repetition of the description.

Figure 9 is similar to Figure 8 in the parts and their operation exceptin Figure 9 the cable i0 is omitted and a hand grip 62 used for movingforward the spindles which carry the chisel and boring bit. IJVhile awork table will be employed none is illustrated in Figure 9. Y Y

A mortiser built as illustrated and described costs very much `less thanother machines in manufacture and is efficient in operation and notliable to get out of good working condition. The preferred details ofthe various forms have been illustrated and described with fullness butit is to be understood that changes may be made in some details andessential features sought to be defined by the claims still be retained.

The base plate which carries the tubular boxing and associated elements,instead of being supported from a standard or post,

Vmay be attached to a suitable table of anyl desired form andconstruction as a support for the parts, but as the table does notconstitute the inventive features it is not illustrated in the drawingsbut will be understood clearly by those skilled in the art.

I-Iaving described my invention and set forth its merits what I claim isl. A mortising machine comprising 'a bed or plate having twospacedprojecting members each having a tubular bearing portion parallel tosaid plate, a tubular splined sliding spindle guided in one of saidbearing portions and carrying 'a hollow mortising chisel, a bit spindlesliding and rotating in the spring engaging the means .for connectingthe cable to the splined slidingspindle.

2. A mortising machine comprising a bed or plate having ltwo spacedprojecting members each having a tubular bearing portion parallelto saidplate, av tubular splined sliding spindle vguided in one of said bearingportions and carrying a hollow mortising chisel, a bit spindle slidingand rotating in the other of said bearing portions and also inthetubular splined spindle, having a thrust bearing engagement with thesplined sliding spindle and carrying a bit projecting into said lhollowchisel,1neans for rotating said bit spindle having a sliding rotationproducing relation to said spindle, and means for rotatably connectingsaid means to the bearing l portion in which the bit spindle rotates; an

Y operating cable secured to the splined sliding spindle and runningparallel thereto and be. tween it and said bed plate and through themember having the bearing portion in which the splined member slides, aspiral spring surrounding said cable partly enclosed in the said bearingportion member and having its reaction bearing therein for one end ofthe spring and theother end of the spring engaging the means for`connecting lthe cable Y tothe splined slidingspindle; said machine alsoincluding Aa swinging hanger arm pivotallysupported from one end ofthebed or plate which supports the chisel tubular splined spindle kand therotatable and slid-- i able bit spindle, said hanger being formed with atubular sleeve to receiveawork-table supporting the post, and means forsecuring the table and hanger in their respective adjustments.

In testimony whereof I aiiX my signature.

FREDERICK IV. MONROE.

the other of said bearing portions and also i in the tubular splinedspindle, having a thrust bearing engagement with the splined l slidingspindle and carrying a bit projecting into said hollow chisel, means forrotating said bit spindle having a sliding rotation producing relationto said spindle, and means for rotatably connecting said means to the fbearing portion in which the bit spindle rotates; an operating cablesecured to the splined sliding spindle and runningparallel thereto andbetween it and said bed plate and through the member having the bearing

